Derrick



Jun e 5, 1923.

S. SHAFER, JR

DERRICK w J an!!! I 1 EH! imfl Hg; N W

l 3 $4 a L a? Him. f m M f I l 1. //o I W q o g 3 Sheets-Sheet l v June 5:, 1923.

s. SHAFER,

msmilcx 13. 1921- s Sheets-Sheet 2 Filed Jan.

June 5, 1923.

S. SHAFER, JR

DERRICK Patented June 5, 1923.

warren stares rarest- SAMUEL snares, an, or MILWAUKEE, WISCONSIN,

DERRICK.

Application filed January To all whom it may concern:

I Be it known that I, SAMUEL SHAFER, Jr, a citizen of the United States, residing at Milwaukee, in the county of Milwaukee and State of VJisconsin, have invented certain new and useful Improvements in Derricks, of which the following is a specification.

This invention relates to a portable derrick, and more particularly to an auxiliary, interchangeable derrick-attachment for mixing or paving machines in which the power mechanism is supported upon the frame of the portable machine while the derrick is mounted upon an auxiliary truck attached to and movable with the machine frame.

Derricks or rotary cranes upon paving machines have been brought into general use through the inability torescue the aggregate used in road building from theside of the road, where it is usuallydumped, without collecting with it some of the material of the shoulder of the road, which when included in the paving mixture greatly impaired the quality of the finished roadbed. It was therefore found desirable to bring the aggregate to the paving machine in batch boxes from a central station where the ingredients are mixed in proper proportion. For hana dling batch boxes from trucks or industrial track systems, which approached the paving machine from either side of the roadway, it was necessary to provide a derrick which could be easily transferred from one side of the machine to the other, and which could be properly supported upon the roadway instead of upon the machine frame, and which would not be inconvenient to transfer from place to place with the machine.

The principal object of this invention is the provision of a derrick attachment for paving machines which will accomplish the above enumerated results. A further object of the invention is the provision of an auxiliary derrick-supporting truck for a paving machine which is capable of a movement from one side of a machine to the other without dissembling the derrick parts or disturbing the relative position of sheaves over which the hoisting cable must run. Another object of the invention is to reduce the strain on the machine to a minimum by supporting the derrick mainly upon an auxiliary truck.

13, 1921. Serial N0.'4se,e7s.

A furtherobjeet is to so connect the steering mechanism of an auxiliary truck to the steering mechanlsm of a main truck as-tof cause the two to turn in the travelof the machine assrenoa TO CHAIN BELT without straining of the parts rii 'nother'object of the invention is the provision of a i system ofbrace members for a derrick which will not interfere with the efiicient operation of the hoistingcable, and which will distribute the weight of the parts thetween the frame of the paving mach and the auxiliary frame. A t'll further objectis the securing of a I of action for the derrick of'a paving machine.

Other objects and vention will hereinafter appear in the folv lowing description and the novel features largely increased-radius v advantages the .70

thereof will be particularly pointed out in.

vation the-opposite side of the auxiiiary frame from thatseen in Fig. If

Figure 3 is a diagrainmatic'pl'an showing the manner of changingthe position ofithe auxiliary truck from oneside of the paving machine to the other; v I

Figure 4. is a plan of the forward'end of the main truck and the auxiliary truck with i the parts carried. thereby omitted and showing the details of the joint steering media-- nism. F1gure 51s a detail front elevat on on a relatively large scale, of the guides for the 7 load hoisting cable.

Fig. 6 is a vertical section through'tlie vertical pivotal support of the wheel 'ofthe auxiliary truck. p p

v Fig. 7 is a bottom plan of. the parts touched by the line 7'( of Fig. 6. p I

Like letters of reference indicate like parts throughout the several figures of the draw ings.

While ticular embodiment of my invention, it will be understood that this form is exemplary I have shown and described a pair-.-

only, and that the invention is susceptible of many different embodiments, being limited I 8 in any suitable manner.

only by the scope of the appended claims.

The letter A designates the main frame of a mixing or paving machine on which may be mounted the usual engine and operating parts of a hoisting apparatus. A derrick B is associated with the machine and is mount ed upon an auxiliary truck, which in the present exem'plification of the invention is shown as comprising a single wheel 1 con nected with the forward end of the machine frame A by means of a radius bar or beam "2 composed of connected channel bars having secured at one end thereof ball socket members 3, 3, adapted to engage ball member supported upon the bracket a attached to the front cross bar of the paving machine. At the opposite end of the beam 2 is secured a knuckle bracket 5 in which is mounted the steering knuckle 6 provided with a horizontally extending portion or stub axle, upon which the wheel 1 is mounted for rotation. The steering knuckle is pivoted upon a vertical pin (see Fig. 6) which is securely fastened to the steering knuckle bracket in such away that its axis coincides with the true pivot line of the derrick, to be hereinafter referred to.

It will be seen from this construction that the wheel 1 is rotatably mounted upon;

the end of the beam 2 and that it also has a swiveling motion with respect to the said beam. Through the ball and socket connection the beam 2 is attached to the paving machine in such a manner that it will have a movement of at least 175 degrees in a horizontal plane to swing from one side of the machine to the other, and at least 10 degrees vertical movement on said connection to allow for the unevenness of the ground over which the paving machine may travel.

Mounted upon the beam 2 near its forward end is a fixed mast 7 terminating in a mast top 8. Near its rear end there is mounted upon the beam 2 a strut member 9 composed of two parts connected to the beam 2, to each other and to the mast top An adjustable strut 10 is detachably connected to the frame of the machine through a bracket 11 while its upper end is connected to the mast top 8. A brace bar 12 is detachably connected to the frame of the machine through the said bracket 11 and connected to the steering knuckle bracket 5.

It will be seen that the parts just described form a rigid framework for the movableelements of the derrick hereinafter to be described; the beam 2 and the brace bar 12 through their connections with the frame of the paving machine and the knuckle bracket form a substantially triangular base member of said framework,

while the mast 7 with the fixed strut 9 and the adjustable strut l0 terminating in the mast head 8 form the upright portion of the said framework.

The strut 10 is adjustable in length for the purpose of maintaining the true axis of the mast in a vertical position or in such a position as the operato may deem convenient or desirable for the work in hand, regardless of the grade upon which the machine is operating. This strut is made up of a rod 14 having its ends prov'ded with right and left screw threads and two clevises 13 threaded right and left, respectively, one of which clevises is detachably connected to the bracket 11 by means of the pin 11, while the other is connected to the mast head 8 throu h swivel 8 A hand wheel 15 is provided for turning the rod with relation to the clevises in order to shorten or lengthen the strut, the operation of which will be obvious.

The numeral 16 represents the pivoting mast of the derrick or rotary crane, which is mounted upon the steering knuckle bracket 5 by means of any well known form of rotatable foot bearing 17, and it comprises two channel members suitably connected to each other, at the upper end of which are attached the brackets 17 for sup porting the boom hoist sheave 18. It is connected to the mast top pin 18 by means of the cap 19. Near the lower end of this pivot-- ing mast are secured brackets 20, between which is pivotally mounted the boom 21, composed of angle irons placed back to back at their lower ends and separated at their upper ends for the purpose of mounting therebetween the sheaves 22 upon the hearing pin 23 passing through said irons and to allow the hoisting cable to pass to the swivel block At the upper end of said boom there are provided duplicate brackets 25, in which are mounted the sheaves 26 and 27. The true vertical pivot line of the derrick passes through the center line of bracket 5 and mast top 8.

The radius of action of the boom is varied by means of the following mechanism: Near the foot portion of said boom there are provided brackets for the reception of the winding drum 28, which is controlled by any suitable pawl and ratchet mechanism and hand wheel 29, to which drum the cable 30 is attached. This cable is also attached to the pivoting mast 16 by means of the bracket 17 and tie strap bar 31, a suitable cable clamp 32 being provided for securing it to the tie strap bar. It then passes over the sheaves 26 and 18 and finally to the drum 28. It will be obvious that a paying out of the cable from the drum will cause the upper end of the boom to be lowered increasing the radius of action and that a windcable upon said Shea es.

ing up of the cable upon the drum will cause the boom to be raised and its radius decreased.

The raising and lowering of the load is accomplished through the following mecha nism: Any suitable mechanism may be em ployed upon the frame of the machine for controlling the movement of the hoisting drum 33, which is mounted upon a shaft 34 supported upon the frame in suitable bearings, one of which is shown at 35. The shaft is driven by means of a bevelled gear 36 securely fastened to it and receiving power from a bevelled pinion 37, which in turn is driven from a sprocket 38 and chain con nection with the countershaft of the ma chine.

The hoisting drum 33 is controlled by any suitable or preferred mechanism, a shaft provided with a hand lever 7 8, a clutch 39, and a brake drum 40 typifying the control mechanism therefor.

Supported upon the front of the machine frame in a position in line with the. play off of the hoist drum 33 are brackets as provided with bearings for pins 50,50, forming the bearing members of sheaves 51, Bars 52, 52, are'mo'unted upon pins 50, 50, above and below said sheaves to confine the One, end of the hoisting cable is attached to the hoisting drum 33, from whence it passes over one of the sheaves, mounted upon pins 50, 50. It then passes over the sheave 53 mounted between the component parts of the fixed strut 9 and over sheave 54: on fixed mast 7. It then passes over'sheave 55 mounted upon the pivoting mast 16, from whence it passes over sheave 23 upon the boom 21 tothe block and tackle arrangement supported. upon the forward end of the boom' By this arrangement of sheaves and supports therefor, the hoisting cable may be operated in any. position of the auxiliary truck with relation to the paving machine frame, and a change of position of the auxiliary truck from one side of the machine to the other will have no effect upon the hoisting cable except to throw it from one of the sheaves 51 to the other.

In order that the paving machine and derrick may be transferred from place to place without placing undue strain upon the parts, provision is made for the simultaneous steering of the front truck with the steering mechanism of the machine. This may be accomplished by any suitable system of steering connections, but I have shown in the drawing one form of device which will accomplish the result. The numeral represents the steering drag link under the control of the operative of the machine through the, wheel 61:- 1 This drag link is connected at its forward end to the drag bar'62, which is pivoted to the front axle 63 at its center.

At the ends otf'the front axle are the steering knuckles er of the paving machine, in which are mounted the 1f rent or steering wheels, of the machine. Arms 6'? are provided upon the said stecring knuckles, which are connected together by means of the cross connecting rod 68, the usual pivoted joints between the parts enabling the movements of the connecting rod to be transmitted to both the steering knuckles 6st. and hence to the wheels mounted thereon. Projecting rearwardly from'the drag bar 62 1S an-a-rm 69 which is pivotally conncctedas at TO to the cross connecting rod 68, any suitable form of 'oint between these J-arts being. ore

a l L vided whereby pivotal movement of they draw bar under the influence of the drag link will impart lineal movement to; the cross connecting rod. Projecting forwardly from the drag bar 62 is a yoke 71 terminating in the lug '42 having pivotal connection with the front trucksteeringrod "F3, which in turn is pivotally connected with one of a pair of arms, 7a and 74 ,arried by the steering" knuckle ot the auxiliary or derrick truck.

that the machine appears to pivot about" when it is turning. Z 'lhe changing of the derrick from one side of the paving machine to the other is accomplished by a series of operations, which may be performed in the following order, reference being had to Figure 3 of the drawings, which shows in plan the position of the parts as they appear duringthe changing operation: The brace bar 12 andthefadjust' able strut l0 are released from their connec tion with the frame of the paving machine at the bracket 1-1. The strut l0 "is then swung horizontally in clockwise direction as indicated by the arrow or. while the brace bar 12 is swung horizontally in ,a clockwise-direction as indicatedby'the ar row 6. The pin in the connection 75 is re moved from the outer forked end ofthe connecting rod 73, which is then disconnected from the frontof the pavingmachine.

The supporting wheel 1 is swung until it is 1n position at right angles to the beans 2 as represented in full linesin Fig. 3 so that it will travel in a curved path with the beam radius. then made fast with reference to theradius bar or beam 2 so that it cannot turn on the pivot of its steering knuckle, as by means of a pin that passes through an'aperture in counter- The supporting wheel 1' is .90- It' is obvious that by this mechanism, moveone of the arms, 74: or 74%, of the steering knuckle and into an aperture or recess provided therefor in a projection 81 of the steering knuckle supporting bracket 5, as illustrated in Figs. 6 and 7. The auxiliary truck carrying the derrick and the brace bar 12 and strut 10 are then swung about the ball joint 3 along the course in dicated by dotted lines and in the direction of the arrow 0 until such a position is reached that the brace bar l2 and strut 10 may be connected to a bracket ll on the oppositeside of the machine. The wheel 1 is then released and turned to the position indicated the right of Fig. 23, and its cou nection with the steering mechanism of the main truck re-established, through the steering rod 73 and the steering arm 74:, which is now in advance, whereas the arm Yet was in advance when the derrick frame was on the other side of the main truck. With the brace bar 12 and strut 10 connected to the bracket 11 and the steering rod 73 connected with the arm 74' and the lug 72, it will be seen that the derrick is in condition for use, but is on the opposite side of the main truck from where it was before the ch anq'e just described had been made, and that the derrick truck may be moved and steered with the paving machine, as heretofore described.

In connection with the foregoing detailed description, the operation of the several parts of the paving machine has been set forth. The operation of the machine should therefore be clear from the following general description thereof: W hen the paving machine is to be used the auxiliary truck is placed to one side or the other of the main frame and secured in position by connecting brace arm 12 and. adjustable strut 10 to the main frame, while the steering mechanisms of the two trucks are connected. WVhen thus assembled, the machine may be carried under its own power or otherwise hauled to the place of use. It will be noted that the weight of the derrick is mainly upon the auxiliary frame, and that the construction of framework of said auxiliary truck is such as to insure that all strain due to the hauling of the machine will be successfully sustained.

As soon as the machine is stopped it is ready for use, provided the derrick is located at the proper side thereof. it will be obvious that the provision of the auxiliai r truck with the beam 2 has largely increased the radius of action of the rotary crane or "When it becomes desirable to work from the opposite side of the roadway, it is only necessary to detach the steering rod 7 3, the brace arm 12 and strut 10 and to bring the wheel into tangential relation to the end. of the beam. 2 in order to shift the derrick or crane to the opposite side of the paving machine, where they are reconnected, when the machine is again ready for use and for any subsequent advancement over the roadway.

l Vhat is claimed is:

1. In a portable derrick, a portable main truck, an auxiliary truck associated therewith, means connecting the auxiliary truck with the main truck so that it will travel. therewith and arranged to permit the auxiliary truck to be moved bodily over the ground relative to the main truck, withoutdisconnecting it therefrom, and a derrick supported upon the auxiliary truck.

2. In a rotary crane, a main support, a truck associated therewith, means for connecting said truck to said support for movement relative thereto, comprising a pivot permitting the auxiliary truck to move bodily over the ground relative to the main support, and a derrick mounted on said truck.

3. In a portable derrick, a main truck, an auxiliary truck associated with said main truck, means for pivotally connecting said auxiliary truck to said main truck, the connecting means permitting both lateral and vertical movements of the auxiliary truck relative to the main truck, and a derrick mounted upon said auxiliary truck.

4. In a portable derrick, a main truck, an auxiliary truck associated with said main truck, means for pivotally connecting said auxiliary truck to the forward. end of said main truck, so that said auxiliary truck may be swung from one side of said main truck to the other, and a derrick supported by said auxiliary truck.

-5. In a portable derrick, a main truck, an auxiliary truck, means pivotally connecting the forward end of said main truck at its central portion, with the auxiliary truck so that the latter may be moved inan are relative to the main truck, means for holding said auxiliary truck in the desired spaced relation to said main truck, and a derrick mounted upon said auxiliary truck.

6. In a portable derrick, a. main truck, an auxiliary truck pivotally connected to the forward end of said main truck, and movable relative to the main truck about its pivotal connection, a derrick mounted upon said auxiliary truck, means for holding said auxiliary truck in a definite spaced relation to said main truck, and means for supporting said derrick in an upright position upon said auxiliary truck.

7. In a portable derrick, a main truck, an auxiliary truck pivotally connected to the forward end of said main truck, a derrick a derrick supported upon said auxiliary truck, means for holding the forward end of said auxiliary truck frame in spaced relation to said main truck frame, and means for holding the upper end of said derrick in spaced relation to said main truck frame.

9. In a portable derrick, a main truck frame, an auxiliary truck comprising a wheel "and wheel support and a member for pivotally connecting said wheel support to the central forward portion of said main truck frame, a derrick mounted upon said auxiliary truck, a brace bar connecting said wheel support with said main truck frame, and a strut member connecting the upper portion of said derrick to the side of said main truck frame.

10. In a portable derrick, a main frame, derrick truck comprising a beam pivotally connected at one end to the main frame, and a wheel support at the opposite end of said beam, uprights mounted upon said beam and forming a supporting tower a rotary crane mounted upon said wheel support and supported at its upper end by SZLKl'tOWQI', means for holding said derrick truck in spaced relation with said main frame, and means for holding the upper end of said tower in spaced relation to said main frame.

11. In, a portable derrick, I and an auxiliary truck associated therewith, means for pivotally connecting said auxiliary truck to said main frame, so that the auxiliar y truck will be given an arcuate movement from one side to the other of the mainframe, a supporting tower mounted upon said auxiliary truck, rotary crane mounted upon said auxiliary truck and connected to said supporting tower at its upper end, means for dei the forward end of said auxiliary truck to the main frame, and means for detachably connecting the supporting tower to the main frame.

12. A bodily movable, auxiliary derricksupporting truck for a paving machine comprising a beam, carrying at its free end a. pivotal connection by which it may be united with a main frame, a wheel upon the end of said beam, a supporting tower mounted upon said beam, and a rotary crane mounted upon said truck and pivotally connected at its upper end to said supporting tower.

13. A bodily movable auxiliary derricksupporting truck comprising a wheel support, a truck frame for pivotally connecting tachably connect-in a main frame the wheel support to a main frame, a sup: porting tower upon said truck frame, a rotary crane mounted upon said wheelsupport and pivotally connected to the supporting tower at its upper end.

1d. Ina portable-derrick, a main truck, a wheel-supported, auxiliary derrick-supporting truck associated with said main truck, means pivotally connecting the auxiliary truck with the'main truck,permittiug a bodily movement of the former relative to the latter, means for holding thetrucks in definite spaced relationship to each other, and means forsteering said main and auxiliary trucks in unison.

15. In portable derrick, a main truck, a wheel-supported auxiliary derrick truck pivotal connections uniting the trucks and permitting the auxiliary truck-to be moved bodily from one side ofthe main truck to the other, means for holding the trucks in iixed spaced relationship after the auxil-- iary truck has been adjusted to the desired position, steering mechanisms for said main and auxiliary trucks and connections be-- tween said steering mechaiiisi'ns, whereby said main and auxiliary trucks'may be si-. 'multaneously steered.

16. In a portable derrick, a main truck, an auxiliary derrick truck, means for maintaining said trucks in definite spaced relationship, steering mechanism for said main truck, steering means for said auxiliary truck comprising a connecting rod attached to a movable part of the steeringmechanism of the main truck whereby the said trucks.

-may be steered s imultaneously-..

17 In a portable derrick, a maintruck, a steering mechanism therefor, an auxiliary derrick truck comprising-a wheel support and a beam connecting the same to the main truck, said wheel support having asteering knuckle, and connections between the steering mechanism of the main truck and the steering knuckle of the 'au'xiliary truck whereby the said trucks may be simultaneously steered. v

181111 a portable derrick, a main truck,

an auxiliary derrick supporting truck, asso ciated therewith, means for maintaining said auxiliary truck in fixed spaced relationship to said main truck at either side of said main truck, and a unitary steering mechanism for said trucks. p

19 Ina portable derrick, a main truck, an auxiliary truck mounted to swingfrom one side of said main truck to the other in an arcuate path, means for securing said auxiliary truck to said main truck at either side thereof, steering means'fo'r each of said.

trucks, and a connection between the steel:- ing means of one truck and that of the other whereby the trucks may be steered in unison.

20. In a portable derrick, a main truck,

an auxiliary truck comprising a wheel support and a beam pivotally connected to said wheel support and to the central portion of the front of the main frame, whereby said wheel may be shifted from one side or the main truck to the other, said wheel support comprising a steering knuckle and a pair of arms projecting therefrom, a steering mechanism for said main truck, and a detachable connection between said steering mechanism and one oi said, arms, whereby the auxiliary truck may be steered simultaneously with the steering of: the main truck.

in a portable derrick, a main truck, an auxiliary truck pivotally connected to said main truck for movement from one side to the other of the main truck, steering mechanism for steering both said trucks in unison, and means for disconnecting the steering mechanism or the auxiliary truclr to permit the aforesaid pivotal movement.

22. In a portable derrick, a main truck, an auxiliary truck pivotally connected to said main truck for movement from one side to the other of the main truck, brace mem bars for holding said auxiliary truck at either side of said main truck, steering mechanism for steering the two trucks in unison, and means for disconnecting the brace members and a portion oi. the steerin" mechanism to permit the said pivotal in: ment of the auxiliary truck from one side oi? the main truck to the other.

The combination with a main portable truck, oi an auxiliary wheel-supported truck, connections between the auxiliary truck and one end of the main truck, which permits the auxiliary truck to be moved bodily to one side or the other of the main truck, and means for maintaining the trucks in fixed spaced relationship to each other after the auxiliary truck has been adjusted to a side or the main truck.

2d. The combination with a main portable truck, of auxiliary truck, jointed connections between the trucks permitting the auxiliary truck to le bodily moved iaterally over the ground relative to the main truck, and a detachalgilc and adjustable connection between the trucks, arranged, in combination with the said jointed connections, to maintain the auxiliary truck fixedly in the position to which it may be adjusted.

25. The combination stated in claim 24 when the adjustable connection between the trucks is a brace bar having detachable connections at its opposite ends respectively with the said trucks.

26. The combination with a main portable truck, an auxiliary truck, a radius bar pivotally connected at one end with the main truck, and also pivotally connected at its other end with the auxiliary "truck, and adapted to permit the auxiliary truck to be moved bodily about the end of the main truck on the arc of a circle, and a brace bar rigidly uniting the trucks and holding the auxiliary truck in a fixed position, the brace bar being reversible from side to side of the main truck to hold the auxiliary truck in different positions.

27. The combination with a main portable truck, an auxiliary truck provided with a,

supporting and steering wheel, pivotal connections between the trucks arranged to hold the auxiliary truck beyond the end of the main truck either at one or the other side thereof as the auxiliary truck may be adj usted, means for holding the auxiliary truck in fixed relation to the main truck in the position to which it may be adjusted, steering mechanism tor the main truck, and connections between the said steering mechanism and the steering wheel of the auxiliary truck. such connections being adjustable to suit the location of the auxiliary truck to which it may be adjusted.

28. The combinationwith a main wheelsupported truck, an auxiliary truck pivotal connections between the trucks, comprising a radius bar arranged to permit the auxiliary truck to be moved over the ground relative to the main truck on the arc of a cicle, a pivotally supported ground wheel carried by the auxiliary truck adjustable to a position parallel with the wheels of the main truck for ordinary transit purposes, or to a position at right angles to the radius bar to permit adjustment of the auxiliary truck, steering means for the main truck and connections between the said steering means and the ground wheel of the auxiliary truck arranged tocause simultaneous steering of the wheels of the two trucks.

SAildUEL SHAFER, JR. 

